# US 12,224,408 B2 · Battery pack having BMU component damage prevention structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,408 B2 - Document ID: US12224408B2 - Status: Granted - Kind: B2 - Application number: 17/632,854 - Filed: 2020-12-30 - Published: 2022-10-06 - Granted: 2025-02-11 - Earliest claimed: 2020-01-14 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Energy Solution, Ltd. - Inventors: Hyuk Joon Son; Jae Young Jang; Jin Hyun Lee - Web page: https://patentgrep.com/patent/US12224408B2 ## CPC - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells - H01M 50/242: adapted for protecting batteries against vibrations, collision impact or swelling - H01M 50/289: characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) - H01M 50/291: characterised by their shape - H01M 50/543: Terminals - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Discussed is a battery pack including a structure for reducing damage to a component of a Battery Management Unit (BMU), and more particularly, to a battery pack with a structure that mitigates a concentration of stress caused by external vibration or force on the BMU mounted on a BMU mounting part and facilitates the assembly of the BMU, so that the BMU can be stably fixed to an assembled position to reduce damage to BMU components. The battery pack includes a partition configured to divide cell mounting parts and the BMU mounting part, and the partition have a stress concentration relaxation structure. ## Claims ### Claim 1 A battery pack comprising: two or more battery cells in which a positive terminal and a negative terminal protrude from one outer periphery of each of the battery cells; a Battery Management Unit (BMU) electrically connected to the positive terminal and the negative terminal of each of the battery cells to control an operation of the battery cells; and a frame member on which each of the battery cells and the BMU is respectively mounted, wherein the frame member comprises: cell mounting parts on which the battery cells are mounted; a BMU mounting part on which the BMU is mounted; and a partition configured to divide the cell mounting parts and the BMU mounting part, and the partition having a stress concentration relaxation structure, wherein the partition is formed to have a slope inclined by a predetermined angle θ in a direction of the cell mounting parts, and the partition is not perpendicular with the cell mounting parts. ### Claim 2 (depends on 1) The battery pack of claim 1, wherein the cell mounting parts are formed in a frame-shaped structure with an open upper and lower surfaces, and are formed at both ends of the frame member to accommodate the battery cells; wherein the BMU mounting part has an open top surface, insertingly accommodates the BMU, and is formed between the cell mounting parts; wherein the partition comprises two or more areas having different heights from a bottom surface of the BMU mounting part. ### Claim 3 (depends on 2) The battery pack of claim 2, wherein the partition comprises: a first partition which is an area formed to have a predetermined first height from the bottom surface of the BMU mounting part; and a second partition formed by extending upward from an upper end portion area of the first partition by a predetermined second height. ### Claim 4 (depends on 3) The battery pack of claim 3, wherein the second partition is formed as at least two or more second partitions at a predetermined interval on both sides of the upper end portion area of the first partition. ### Claim 5 (depends on 3) The battery pack of claim 3, further comprising a fixing part for fixing the BMU mounted on the BMU mounting part, wherein the fixing part is formed on an inner wall facing the BMU mounting part of the second partition. ### Claim 6 (depends on 5) The battery pack of claim 5, wherein the fixing part comprises: a protruding part protruding from the second partition by a predetermined length in an inward direction of the BMU mounting part to prevent separation of the BMU mounted on the BMU mounting part; and a connection support part extending from both sides of the protruding part toward an inner surface of the second partition by the predetermined length in a curved shape and supporting a connection between the second partition and the protruding part. ### Claim 7 (depends on 3) The battery pack of claim 3, wherein the partition includes a pair of partitions that are parallel to each other, wherein a first of the pair of partitions includes at least one second section, wherein a second of the pair of partitions includes at least one second section, and wherein the at least one second section of the first of the pair of partitions and the at least one second section of the second of the pair of partitions are entirely aligned to face each other. ### Claim 8 (depends on 1) The battery pack of claim 1, wherein the partition is formed to have a predetermined height as a whole with respect to a bottom surface of the BMU mounting part, and wherein a hole is formed in a lower region of the partition. ### Claim 9 (depends on 8) The battery pack of claim 8, wherein the hole is formed as at least two or more holes at predetermined intervals in a length direction of the partition. ### Claim 10 (depends on 1) The battery pack of claim 1, wherein the stress concentration relaxation structure disperses concentration of stress applied to the BMU by selectively applying stress to local portions of the BMU. ### Claim 11 (depends on 1) A device comprising the battery pack according to claim 1.